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As such, terahertz spectroscopy cannot resolve the spin structure of conducting particles. Here we introduce the spin sensitivity to terahertz spectroscopy by using the spin-valve configuration of the sample. As a result, the number density and momentum scattering time of conduction electrons in a ferromagnetic metal can be resolved according to their spin.
We investigate the relaxation pathways of photoexcited carriers in graphene. These carriers relax their energy through either carrier-carrier scattering or phonon emission, depending on photoexcitation conditions and the Fermi level.
We observe a giant magnetoresistance effect in CoFe/Cu-based multistack using THz time-domain spectroscopy. The magnetic field-dependent dc conductivity, electron scattering time, as well as spin-asymmetry parameter of the structure are successfully determined.
We report the nonlinear THz conductivity of graphene. The heating of charge carriers by strong THz pulses results in a reduction of the high-frequency conductivity of graphene, in spite of reduced scattering for high-energy carriers.
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